The royalty business of Permian Basin powerhouse Diamondback Energy Corp. (NASDAQ: FANG) launched an upsized equity offering on Feb. 26 to pay down debt after a year of roughly $615 million worth of minerals deal making.

Viper Energy Partners LP (NASDAQ: VNOM) priced its public offering of 9.5 million common units with a roughly 1.4 million-unit greenshoe at $32 per unit. The offer had originally been for 8 million units with a 1.2 million-unit shoe.

The company expects roughly $304 million in gross proceeds from the offering to be used to repay a portion of outstanding borrowings under Viper’s revolving credit facility. Proceeds from the offering’s greenshoe option could also go to funding additional acquisitions.

The offering by Viper comes when public investors have been largely drying up the capital markets for acquisitions from upstream oil and gas producers.

“Not the usual release that we see in tandem with mineral acreage additions, but the company’s revolver balance reached an all-time high of $411 million at year-end 2018,” analysts with Tudor, Pickering, Holt & Co. (TPH) said in a research note on Feb. 27.

TPH estimates the offering was priced at a roughly 5.4% discount to Viper’s stock price of $33.84 at close Feb. 26.

Viper is a limited partnership formed by Diamondback to own, acquire and exploit oil and natural gas properties in North America, with a focus on oil-weighted basins, primarily the Permian Basin and the Eagle Ford Shale.Viper Energy Partners Mineral Asset Map (Source: Viper Energy Partners LP)

Last year, the company closed 88 deals for an aggregate purchase price of about $615 million. The acquisitions correspondingly grew Viper’s asset base by over 5,000 net royalty acres throughout the year, according to Travis Stice, Diamondback’s CEO who also serves as the head of Viper’s general partner.

“Our acquisition machine continued to consolidate Tier 1 properties as represented by Viper,” Stice said in a statement earlier this month.

Viper’s footprint of mineral interests at year-end totaled 14,841 net royalty acres. The company said it had funded these acquisitions with cash on hand and borrowings under its revolving credit facility.

The company also ended the year with a cash balance of $22.7 million and $144 million available under its $555 million revolving credit facility, Viper reported on Feb. 5.

“Still looking to later in the year for a sizable transaction to potentially incorporate an incremental issuance, though likely to [Diamondback] and to come with a sizable mineral acreage acquisition,” the TPH analysts said.

For context, TPH noted Diamondback’s earnings conference call where the company quantified roughly 2,000 net mineral acres it owned with another $60 million to $80 million of minerals-driven cash flow Diamondback acquired through its purchase of Energen last year.

Credit Suisse is the book-running manager for Viper’s equity offering.

Emily Patsy can be reached at epatsy@hartenergy.com.